What is Potassium Cyanide?

Question

What is it usually used for??
Is it illegal?

Answer 1

Its chemical formula is KCN
In case you don't know, it is EXTREMELY toxic.
It has limited use, mostly on precious metals recovery and in laboratories.
It has been banned in U.S. and many other countries for mostly all industrial use. It is illegal in the fact that you need a ton of permits, training, environmental controls and a valid use to justify its possesion.